/Engine/Source/Runtime/AIModule/Public/HierarchicalHashGrid2D.h
Ratio in cells between consecutive levels. Cells are located based on their hash. Each cell stores linked list of items at that location and how many children are under the same location in the finer grid levels.
struct FCell
int32
ChildItemCount
First item in the item linked list. (index to Items array, or INDEX_NONE)
int32
First
Location of the cell
int32
Level
int32
X
int32
Y